<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px;
            height:  100px;
            background-color: pink;
        }
    </style>
    <script src="../jquery-3.5.1.js"></script>
    <script src="./jquery.color.js"></script>
</head>
<body>
    <button>改变背景色</button>
    <div></div>
    <script>
        $(function(){
        

            $('button').on('click',function(){
                var json={'background-color':'#000','width':'800'}
                $('div').animate(json,2000)
            })
        })
    </script>
</body>
</html>